74 lines
2.8 KiB
C#
74 lines
2.8 KiB
C#
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using Microsoft.AspNetCore.SignalR;
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using SHH.Contracts;
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using System.Collections.Concurrent;
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namespace SHH.CameraDashboard
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{
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/// <summary>
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/// [SignalR 中心]
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/// 职责：负责物理链路的维护，将网络消息路由到业务层 (CommandServer)
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/// </summary>
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public class CameraHub : Hub
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{
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// 静态映射表：InstanceId -> ConnectionId (用于定向发指令)
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private static readonly ConcurrentDictionary<string, string> _instanceMapping = new();
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// =================================================================
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// 1. 注册逻辑 (替代原 CommandServer.HandleRegistration)
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// =================================================================
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/// <summary>
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/// 供 CameraService 调用
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/// </summary>
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public async Task Register(RegisterPayload payload)
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{
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string connectionId = Context.ConnectionId;
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// 1. 记录映射关系
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_instanceMapping[payload.InstanceId] = connectionId;
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// 2. 将连接加入组 (按 InstanceId 组队，方便 CommandServer 发指令)
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await Groups.AddToGroupAsync(connectionId, payload.InstanceId);
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// 3. 回调业务单例处理 UI 逻辑
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CommandServer.Instance.HandleClientRegister(payload);
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Console.WriteLine($"[Hub] 收到注册: {payload.InstanceId}, 连接ID: {connectionId}");
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}
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// =================================================================
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// 2. 指令回执
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// =================================================================
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/// <summary>
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/// 供 CameraService 执行完指令后调用
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/// </summary>
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public void ReportCommandResult(CommandResult result)
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{
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CommandServer.Instance.HandleCommandResult(result);
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}
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// =================================================================
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// 3. 视频流中转
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// =================================================================
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/// <summary>
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/// 供 CameraService 上传图片
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/// </summary>
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public async Task UploadFrame(VideoPayload payload)
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{
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// 转发给订阅了该摄像头的组 (例如 Dashboard UI 订阅了该组)
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await Clients.Group($"Watch_{payload.CameraId}").SendAsync("OnFrameRecv", payload);
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}
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// =================================================================
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// 生命周期管理
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// =================================================================
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public override async Task OnDisconnectedAsync(Exception? exception)
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{
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// 清理映射逻辑可以在这里扩展
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await base.OnDisconnectedAsync(exception);
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}
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}
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}
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